Casting mold



June 16, 1925.

C. D. PETTIS CASTING MOLD 3 Sheets-Sheet 1 Filed April 11. 1924 1 ll A IIIA? June 16, 1925.

C. D. PETTIS CASTING MOLD Filed April 11, 1924 IS Sheets-Sheet 3 i/mm W Fl ii a! s1): v D O 6 0 7 7 h W wm W L w i s @l I a M 8 l 0 m ll m BN Lra! w w W f 1 a I:

Patented June 16, 1925.

cumin? 1:. runs, on NEW YORK, N. Y.

Application filed April 11, 1924. Serial No. 705,775.

To all whom it may concern:

Be it known that I, Cmr'roN D. PE'1'1IS a citizen of the United States, and a residelu of New York city, in the county and State I} of New York, have invented certain new and useful Improvements in Casting Molds,

of which the following is a specification.

This invention relates to moldsfor casting metal but more particularly to that "class 10 of casting molds designed to be repeatedly used in the casting operation and commonly desi ated permanent molds.

e primer object of the invention is to produce a mo d of this type which is simple and durable in construction and which may be quickly and easily operated to provide a lar output.

urther important objects are to PTOVldl:

a simple and elfioient means for supporting 50 an insert within the mold cavity during the casting operation, to provide in the mold improved means for holding the mold sections in closed position during the casting operation, to rovide an improved construction to close t e mold, to facilitate the placing of this closure upon the drag prior to the casting operation and its removal therefrom upon the completion of such operation, to provide effective venting of the gases from the mold, to prevent injury to the refractories, and in general to provide an improved casting mold.

The many other objects and advantages of my invention will be better understood 85 by reference to the following specification when considered in connection with the accompanying drawings illustrating certain selected embodiments thereof, in which iThe general construction of my improved 40; casting mold is similar in character to that forming the subject matter of my pending applications, Serial No. 633,131, filed April 19, 1923; Serial No. 633,822, filed April 23, 1923, and Serial No. 637,165, filed lay 7,

45 1923, and reference may be had thereto for a more full description.

While I have chosen to illustrate the principles of my inventionin a mold designed particularly forthe casting of railway brake shoes, it Will be readily appreciated that the same are equally applicable to molds for casting a y other a twla Referring to the drawing, Figure 1 is a side elevatmn of a mold for casting brake shoes, the parts being in closed position.

Fig. 2 is a plan view of the mold shown in Fig. 1.

Fig. 3 is the same as Fig. 1, end elevation.

g. 4 is a transverse vertical section on the 44 of: Fig. 2.

Fig. 5 is a longitudinal vertical section on the line 5-5 of Fig. 2.

Fig. 6 is a detail plan view of the drag.

Fig. 7 is an inverted plan view of the mold closure with back unit in position and ready to be placed in the mold.

Fi 8 is a. longitudinal vertical section on the line 8--8 of Fig. 7.

Fi 9 is a transverse section on line 9-9 of Fig. 7, and

Fig. 10 is a detail perspective view.

The casting mold in the present embodiment is mounted on a base A and comprises a plurality of separable members forming a flask or holder, each member carrying a portion of the molding receptacle. The base A is provided with oppositely disposed lugs and 16, whi h support a rod 17 on which are pivotally mounted the two side members B, B of in. mold. Similar rods 18 and 19 are supported by lugs 20 and 21 respectively and the end members C of the mold are pivotally mounted on these rods. The members B, B are operated by cams 22, 22 co-acting with lugs 23 on these members. The cams 22, 22 are each socured upon a sleeve revoluble upon opositely disposed stud shafts 24 supported )y upstanding lugs 25 on the base A and these sleeves are adapted to be manually rotated by means of operating levers 26.

The members B, B are alike in form except that their arrangement is reversed. Each of these members includes a metal holder or flask section in which are mounted a plurality of blocks 28 forming a portion of the molding receptacle. In the present embodiment these blocks are of ighly refractory material, though metal blocks may be substituted for any of these where chilling actionris desired. The outer wall of the member P is formed by a separable plate 32 secured to the member by screws 33 r other sultable means. This inthe mold. The sections 73 and 74 are then placed in position on the reinforcing back, and the side members are moved to closed position, the lugs 37 holding all sections of the closure firmly in position. The end members are now moved to closed position and the mold is ready to receive the melted metal. After the casting has solidified sufficiently, the end members are moved to open position, then one or both of the side members, and the casting and sections of the top or closure member are together lifted from the remaining portions of the mold, the casting being held by the clips (36. These clips are then straightened at their upper ends, and the shoe casting drops away. The mold is then ready to be reassembled for a new pouring.

From the foregoing description it will be readily evident that my improved mold is simple and desirable in construction and may be easily operated to provide a large output. A simple and eflective means has been provided for suspending the metal insert within the mold cavity during the casting operation. The sections of the mold are securely held in closed position. The construction for clos ing the molding receptacle is simple and advantageous. The closure member may be easily placed upon the drag or removed therefrom. The entire construction provides free venting of the gases from the mold and protects the refractories from injury.

I am aware that numerous changes in the form and arrangement of parts of my mold may be made by anyone skilled in the art. without departing from the spirit of my invention, and I reserve the right to make all such as fairly fall within the scope of the following claims.

I claim as my invention:

1. A mold for making castings, comprising an openable multi-part drag having a molding cavity therein formed partially by each of the parts but open at the top, a closure for said cavity forming a continuous span between the parts of the drag, and means on said drag for clamping said closure in position by the closing of the drag.

2. A mold for making castings, comprising relatively movable mold members and a closure member adapted to rest thereon, said movable members being constructed to directly clamp and interlock with the body of the closure member for holding said closure member against removal while the movable members are in closed position.

3. A mold for making castings, comprising relatively movable members having a mold cavity formed thereby and open at the top throughout its entire length, and a sectional closure for said cavity clamped and v held against removal by said movable members when in closed position.

4. A mold for making castings, comprising a multi-part drag having a mold cavity formed thereby and open at the top through out its entire length. and a separate sectional top closure for said cavity fitting within the upper part of said cavity and having body portions thereof between the drag parts and other body portions overlying an resting on each of said drag parts.

3. "A mold for making castings, comprising relatively movable members having a mold cavity formed thereby and open at the top, a closure for said cavity adapted to be loosely placed upon said side members when in normal open position, and means operable to interlock the body of said closure and secure said closure in position by the bringing of said members to closed position.

6. A mold for making castings, comprising relatively movable members having a mold cavity formed thereby and open at the top, a closure for said cavity adapted to be placed over said cavity when said members are in normal position to permit removal of a finished casting, and interlocking means on said members and closure body operable to secure said closure on said members by the bringing of said members to closed position.

7. A permanent mold for making metal castings. comprising relatively movable side members having a mold cavity formed partially in each of said members and open at the top, a closure for said cavity adaptedto be placed upon said members in open position, and lugs on said members interlocking with portions of said closure to secure said closure on said members when said members are brought to closed position.

8. A mold for making castings having a mold cavity with one open side, and a closure for said side including a separable section, said closure and said section both l cooperating with the same open side of the mold and each constituting a partial closing means therefor, said closure embodying means for bodily removing it together with a finished casting.

9. A mold for making castings'having a mold cavity with one open side, and a closure for said side including a plurality of separable sections, said closure and said separable sections all cooperating with the same open side of the mold and each constituting a partial closing means therefor, said closure embodying means for bodily removing it together with a finished casting.

10. A permanent mold for making metal castings, coniprising a drag having a mold cavity therein open at the top, and a closure for said cavity adapted to rest on said drag and including a center section and separable end sections.

11. A permanent mold for making metal castings, comprising a. drag having a mold cavity therein open at the top, and a closure for said cavity adapted to rest on said drug and including a center section and separable end sections one of said end sections forming the pouring gate of the mold.

12. A permanent mold for making metal castings, comprising a drag having a mold cavity formed therein and open at the top, and a closure for said cavity se arate from said drag and adapted to rest t ereon, said closure comprising a plurality of blocks with certain of blocks secured together and certain other blocks unattached.

13. A permanent mold for making metal castings, comprising a drag having a mold cavity formed therein and open at the top, and a closure for said cavity se arate from said drag and adapted to rest is ercon, said closure comprising a plurality of separate sections certain of which include a plurality of blocks.

14. A permanent mold for making metal castingscomprising a drag having a mold cavity formed therein and open at the top, and a closure for said cavity separate from said drag and adapted to rest thereon, said closure comprising a central section and separate and sections the central section being formed or a plurality 01'": blocks attached together,

15. A mold for maicin castings, comprising a. mold-member rag having the parting line extending longitudinally of the mold and substantially centrally of the mold cavity, said cavity being open at the top, and a closure for top divided transversely of the mold into sections, at least some of said sections resting on one drag member and the o posits end resting on the other drag rnem ml.

16. A mold for making castings, comprising a drag having a mold cavity therein open at the top and a closure for said separate from said drag and comprising a plurality of parate sections having a com mcn supporting plate adapted to become incorporated in a finished casting.

'17. A mold for making casting comprising relatively movable drag members nav ing a mold cavity therein open at the to a closure for said cavity formed in bodily removable sections, and means on said drag members for locking, the sections of the closure thereon by the moving of said members to closed position.

18. A permanent mold for making castings comprising a drag having a mold cavity therein open at the top only, a bodily rein'ivable closure for said cavity comprise ing a plerality of prefornied imlcpcndeirt sections all cooperating with said opcn top and means for attaching to at least one of said sections an insert to be embedded in the casting.

19. A permanent mold for making casi- -ings, comprising a drag having a mold cavity therein open at the top, a closure for said cavity comprising a pluralit of separate sections, one of said sections eing formed of a plurality of blocks, and means extending between said blocks and engaged with a unit and the top of the section to sus end the unit in the mold cavity- ,0. The tmnbination with a permanent mold for making castings comprising a drag having a mold cavity therein open at the top and a closure for said top of a member tor suspending a unit in the mold cavity comprising a fiat strip of metal havin on each end a trans ersely extending hea 21. A permanent mold for making castings, comprising a drag having a mold cavity therein open at the top and a closure for said top having grooves extending there through and communicating with the mold cavity, and fiat strips of metal extending through said grooves and having angularly disposed means adapted to engage the closure and a unit to be embedded in the casting to suspend the unit in the mold cavity.

v A. permanent mold for making castings including relatively movable side and end members at least one side member being movable in a direction substantially rormal to the direction of movement of one of the end members, and a shoulder on one of said men'ibers adapted to overlie a portion of the other member when said members are in closed position to lock said other member in this position.

23. A permanent mold for making castings including relatively movable side and end members, at least one side member bemovable in a direction substantially normal to the direction of movement of one of the end members. and shoulders on said end members adapted to overlie portions of said side iii-embers when said members are in closed position to retain said side members in said position, said side members being released by the opening of said end members.

In a casting. mold. a pouring gate coax-prising a pair of oppositely disposed ilor having the pouring passage formed partially in each, and a rib on the face of one of said blocks lying within a corresponding groove in the opposing face of the other block.

25. A mold for making castings, comprising relatively movable members having a mold cavity formed thereby and open at th top. a bodily removable. closure for said on itv a l ited to be pl: :ed upon said side i'iieini e x the zmlilltll open position to which the parts are moved to permit ren oval of finished casting, means acting to interlock with and, secure said closure on said nleinbeis as said members are brought to closed position, and means limiting the opening movement of said side members to properly position said members to receive said closure.

26. As an article of manufacture, a mold having a mold cavity, and a separable top closure for said cavity comprising a plurality of sections abutting intermediate the ends of the mold cavity and having means adapted to become incorpora ed with the casting, said top closure being bodily emovable with the casting.

27. As an article of manufacture, a mold having a mold cavity, and a separable top closure removable bodily as a unit with a finished casting, said top closure comprising a plurality of sections abutting intermediate the ends of the mold cavity.

28. As an article of manufacture. a mold having a mold cavity, and a separable top closure for said cavity removable bodily with a finished casting, said top closure comprising a plurality of sections abutting intermediate the ends of the mold cavity and including a metal body adapted to become incorporated in a casting and detachably anchored to the top closure.

29. As an article of manufacture, a mold having a mold cavity with a single open side, a bodily removable closure for mid single open side including a separable section, and a metal plate cooperating with said closure and adapted in lluu'Uluv llli'OY- porated in a finished casting.

30. As an article of manufacture, a mold having a mold cavity with a single open side, a bodily removable closure for said single open side including a plurality of separable sections, and a metal plate coopcrating with said closure and adapted to become incorporated in a finished casting.

31. As an article oi' manufacture, a mold having a mold cavity with one open side. and a closure for said side adapted to rest. on the mold, said closure including a center section and separable end sections, one of said sections forn'iing the pouring gate for the mold.

232. A mold comprising at least one pivotally mounted side member, at least one end member movable about an axis substantially normal to the pivotal mounting of the side member, and interlocking shoulders on at least one side member and one end member, locking one of the members against opening movement until the other member has first been moved to open position.

33. A mold for making castin s, comprising relatively movable members ankl a sectional closure member adapted to rest thereon, said movable members directly rlamping and interlocking with the sides of the body of th closure member sections for holding said sections against removal while the movable members are in closed position.

34. A mold for making castings, comprising relatively movable members, and a closure nien'iber adapted to rest thereon, said movable members directly clamping and interlocking with the sides of the body of the closure member for holding the closure member against removal while the movable members are in closed position,

CLIFTON D. PETTIS. 

